CN2424332Y

CN2424332Y - Self-pressuring stop valve

Info

Publication number: CN2424332Y
Application number: CN 00222536
Authority: CN
Inventors: 李伟琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-18
Filing date: 2000-03-18
Publication date: 2001-03-21
Anticipated expiration: 2010-03-18

Abstract

The utility model relates to a self-pressuring stop valve, which belongs to the valve and can control the fluid flow. The utility model comprises a valve body, a valve seat, a main valve plate, a pilot valve plate, a valve cover, a valve rod and a hand wheel, etc. The main valve plate fixed by an external main valve plate sleeve is arranged above the valve seat arranged in the middle part of the valve body, and the inner part of the valve seat is provided with the pilot valve plate where the valve rod is fixed by a pilot valve plate cover. The valve rod is made to go through a main valve plate cover fixed with the main valve plate, the valve cover fixed with the valve body in turn, and then is fixed by a valve rod nut. After the valve rod nut is built-in with filling material, a material-filling press plate is used to press against the valve rod nut. A pressing sleeve nut is used to fix the valve rod nut, and then the hand wheel is fixed at the upper end of the valve rod. The switching operation is simple, quick and reliable.

Description

The self-pressure type stop valve

The utility model relates to a kind of self-pressure type stop valve, belongs to switch valve, is suitable for controlling the usefulness of fluid flow, all can extensively adopt in each fields such as oil, chemical industry, electric power, metallurgy, light industry, fire-fighting, tap water.

Past traditional type valve all is that direct-type opens or closes, and the pressure that directly overcomes on the flap realizes, so switching process complexity, effort, is difficult to realize industrial process automation, and the requirement on machining accuracy height.

The purpose of this utility model is to overcome employing that prior art exists and directly overcomes pressure on the valve and realize opening or closing and cause switching process complexity, effort, be difficult to realize industrial process automation, and the deficiency that requirement on machining accuracy is high, thereby provide a kind of self-pressure type stop valve, it is to utilize adjusting self pressure to realize opening or closing indirectly, its switching process is simple, fast, reliable, be convenient to realize industrial automation, and processing and material do not had specific (special) requirements, be suitable for extensively adopting the usefulness of control fluid flow.

The utility model is realized by following approach:

The utility model includes valve body, valve seat, the main valve plate, pilot valve plate, the pilot valve plate lid, main valve plate lid, the main valve sleeve-board, valve gap, Stem Mut, valve rod, filler, the gland nut, several parts of hold-down grid and handwheel, establish a valve seat at the valve body middle part, above valve seat, establish the main valve plate, the main valve plate is provided with the main valve sleeve-board outward, be provided with identical pilot valve plate in the main valve plate, and valve rod is fixed by pilot valve plate fixed thereon lid, the main valve plate lid that valve rod is passed successively fix with the main valve plate, the valve gap that fixes with valve body, after being fixed on the valve gap with Stem Mut again, establish filler at the inner correct position of Stem Mut, and push down with hold-down grid, fix with the gland nut again, at last fixing handwheel in valve rod upper end.Be provided with main valve at said valve body front end and enter the hole, the middle and lower part is provided with main valve portals, and covers that being provided with coincide each other and is communicated with main valve at main valve plate and main valve plate and advance the aqueduct that hole and pilot valve enter the hole, covers at the main valve plate and is provided with water channel, in the main valve plate side of covering, form a B storehouse by main valve plate lid and main valve plate.Said main valve plate cross section is greater than the main valve cross section of portalling.Establish pilot valve at middle part, main valve plate lower end and portal, establishing seal ring with main valve plate contacting point correct position.

Figure is the utility model embodiment's a structural representation, wherein:

1-valve body, 2-valve seat, 3-main valve plate, 4-pilot valve plate, 5-pilot valve plate lid, 6-main valve plate lid, 7-seal ring, 8-main valve sleeve-board, 9-valve gap, 10-Stem Mut, 11-valve rod, 12-filler, 13-gland nut, 14-hold-down grid, 15-handwheel, 16-pilot valve portal, the 17-pilot valve enters the hole, the 18-main valve portals, hole, 21-aqueduct, 22-water channel are advanced in 19-B storehouse, 20-main valve.

Describe in detail below in conjunction with the accompanying drawing examples of implementation:

The utility model embodiment includes valve body 1, valve seat 2, main valve plate 3, pilot valve plate 4, pilot valve plate lid 5, main valve plate lid 6, main valve sleeve-board 8, valve gap 9, Stem Mut 10, valve rod 11, filler 12, gland nut 13, hold-down grid 14 and handwheel more than 15 parts, establish a valve seat 2 at valve body 1 middle part, above valve seat 2, establish main valve plate 3, the main valve plate 3 outer main valve sleeve-boards 8 that are provided with, make main valve sleeve-board 8 entangle the top of main valve plate 3 and be fixed on the valve body 1, be provided with identical pilot valve plate 4 in the main valve plate 3, and it is valve rod 11 is fixing by pilot valve plate lid 5 fixed thereon, the main valve plate lid 6 that valve rod 11 is passed successively fix with main valve plate 3, the valve gap 9 that fixes with valve body 1, after being fixed on the valve gap 9 with Stem Mut 10 again, establish asbestos packing 12 at Stem Mut 10 inner correct positions, and push down with hold-down grid 14, fixing with gland nut 13 again, the fixing handwheel 15 in valve rod 11 upper ends at last.

Be provided with main valve at said valve body 1 front end and enter hole 20, the middle and lower part is provided with main valve and portals 18.Being provided with on said main valve plate 3 and main valve plate lid 6 coincide each other is communicated with main valve and advances the aqueduct 21 that hole 20 and pilot valve enter hole 17, is provided with water channel 22 on main valve plate lid 6, above main valve plate lid 6, forms a B storehouse 19 by main valve plate lid 6 and main valve plate 3.Said main valve plate 3 cross sections are greater than portal 18 cross section of main valve.Be provided with pilot valve at middle part, said main valve plate 3 lower ends and portal 16, be provided with seal ring 7 with main valve sleeve-board 8 contacting point correct positions.

During use, when fluid enters main valve and enters hole 20, rotate handwheel 15, valve rod 11 is moved down, the pilot valve of opening B storehouse 19 enters hole 17, close pilot valve simultaneously and portal 16, make fluid flow to B storehouse 19 by aqueduct 21 and water channel 22, at this moment the pressure in the B storehouse equals main valve and advances hole 20 end pressures, because the pressure that main valve advances hole 20 ends is greater than the portal pressure of 18 ends of main valve, so the pressure in the main valve plate 3 greater than the outer pressure of main valve plate 3, makes main valve plate 3 be subjected to move downward under the effect of hydrodynamic pressure, closes main valve and portals 18.

Otherwise, rotating handwheel 15, the pilot valve that valve rod 11 is moved up cut out B storehouse 19 enters hole 17, open pilot valve and portal 16, fluid portals by water channel 22 and pilot valve and 16 flows out, and makes the outer pressure of main valve plate 3 greater than the pressure in the main valve plate 3, and main valve plate 3 moves upward and opens main valve and portal 18.When B storehouse 19 inner fluids when flow equates, main valve plate 3 keeps balances, and main valve plate 3 and 4 of pilot valve plate remain certain distance.

The utility model contrast prior art has following advantage:

1, the utility model is simple in structure;

2, the utility model open and close are light, do not need the complex appts such as electronic, pneumatic, use Very little strength can be opened or be closed the heavy caliber stop valve, and is active in one's movements, reliably.

Claims

1, a kind of self-pressure type stop valve, it is characterized in that including valve body (1), valve seat (2), main valve plate (3), pilot valve plate (4), pilot valve plate lid (5), main valve plate lid (6), main valve sleeve-board (8), valve gap (9), Stem Mut (10), valve rod (11), filler (12), gland nut (13), hold-down grid (14) and several parts of handwheel (15), establish a valve seat (2) at valve body (1) middle part, establish main valve plate (3) in the top of valve seat (2), the outer main valve sleeve-board (8) that is provided with of main valve plate (3), make main valve sleeve-board (8) entangle the top of main valve plate (3) and be fixed on the valve body (1), be provided with identical pilot valve plate (4) in the main valve plate (3), and it is valve rod (11) is fixing by pilot valve plate lid (5) fixed thereon, the main valve plate lid (6) that valve rod (11) is passed successively fix with main valve plate (3), the valve gap (9) that fixes with valve body (1), after using Stem Mut (10) to be fixed on the valve gap (9) again, establish asbestos packing (12) at the inner correct position of Stem Mut (10), and push down with hold-down grid (14), use gland nut (13) fixing again, at last fixing handwheel (15) in valve rod (11) upper end.

2, by the described self-pressure type stop valve of claim 1, it is characterized in that said valve body (1) front end is provided with main valve and enters hole (20), the middle and lower part is provided with main valve portal (18).

3, by the described self-pressure type stop valve of claim 1, it is characterized in that said main valve plate (3) and main valve plate lid (6) is provided with the connection main valve that matches each other and advances the aqueduct (21) that hole (20) and pilot valve enter hole (17), on main valve plate lid (6), be provided with water channel (22), in main valve plate lid (6) top, form a B storehouse (19) by main valve plate lid (6) and main valve plate (3).

4,, it is characterized in that said main valve plate (3) cross section is greater than the portal cross section of (18) of main valve by the described self-pressure type stop valve of claim 1.

5, by the described self-pressure type stop valve of claim 1, it is characterized in that middle part, said main valve plate (3) lower end is provided with pilot valve and portals (16), be provided with seal ring (7) with main valve sleeve-board (8) contacting point correct position.